Head lice are small, wingless insects that live in human hair. Their scientific name is Pediculus humanus capitis, and they have been a human pest for thousands of years. Their full life cycle, from ...

Periodical cicadas have one of the strangest life cycles in the animal kingdom. The 17-year cicadas spend 99.5% of their lives underground in an undeveloped nymph state, which is the longest strictly ...

Jessica Saum, the 2022 Arkansas Teacher of the year, explains how life cycles work with the help of Helen the hen. They look at how seeds become flowers, how eggs become chickens, and how other living ...